RMS Voltage Calculator
Convert Vp or Vpp to VRMS for sine waves
How to Use This Calculator
1
Choose Input Type
Select whether you have peak (Vp) or peak-to-peak (Vpp) voltage for a sine wave.
2
Enter Voltage
Provide the corresponding value in volts.
3
Calculate
Click Calculate to get the RMS voltage.
Formula
VRMS = Vp / \u221A2
VRMS = Vpp / (2\u221A2)
Where:
- Vp = Peak voltage
- Vpp = Peak-to-peak voltage
Example: Vp = 10 V → VRMS = 10/\u221A2 ≈ 7.071 V.
Frequently Asked Questions
Does this assume a sine wave?
Yes. The formulas shown apply to pure sinusoidal waveforms.
Can I convert RMS to peak?
Yes: Vp = \u221A2 · VRMS and Vpp = 2\u221A2 · VRMS.
What about non-sinusoidal signals?
RMS depends on waveform shape. The simple Vp/\u221A2 relation does not hold for non-sinusoidal signals.